CHEMCO Exit Exam • Set 5 Question 18 of 30
Which operation may cause the pressure in an inert tank to fall below the prescribed limits?
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Direct Answer
Option B: Discharging
Discharging cargo can cause a significant pressure drop in an inerted tank as the liquid level decreases, potentially drawing air into the system if not managed correctly. Loading, COW, and steaming typically increase or maintain pressure.
All Options
A
Loading
B
Discharging
(Correct Answer)
C
Crude oil washing
D
Steaming tanks
Detailed Explanation & Context
Discharging cargo can cause a significant pressure drop in an inerted tank as the liquid level decreases, potentially drawing air into the system if not managed correctly. Loading, COW, and steaming typically increase or maintain pressure.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).
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